<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet"  href="font-awesome-4.7.0/css/font-awesome.min.css"/>
    <style>
        body{
            margin: 0;
        }
        .left{
            float: left;
        }
        .right{
            float: right;
        }
        .pg-header{
            height: 48px;
            background-color: #2459a2;
            color: white;
            line-height: 48px;
        }
        .pg-header .logo{
            width: 200px;
            background-color: #204982;
            text-align: center;
        }
        .pg-header .icons{
            padding: 0 20px;
        }
        .pg-header .icons:hover{
            background-color: #204982;
        }
        .pg-header .user{
            margin-right: 60px;
            padding: 0 20px;
            color: white;
            height: 48px;
        }
        .pg-header .user:hover{
            background-color: #204982;
        }
        .pg-header .user .a img{
            height: 40px;width: 40px;margin-top: 4px;border-radius: 50%;
        }
        .pg-header .user .b{
            z-index: 20;
            position: absolute;
            top: 48px;
            right: 0;
            background-color: white;
            color: black;
            width: 160px;
            display: none;
            font-size: 14px;
            line-height: 30px;

        }
        .pg-header .user .b a{
            padding: 5px;
            color: black;
            text-decoration: none;
        }
        .pg-header .user .b a:hover{
            background-color: #dddddd;
        }
        .pg-header .user:hover .b{
            display: block;
        }
        .pg-header .user .b a{
            display: block;
        }
        .pg-content .menu{
            position: absolute;
            top:48px;
            left: 0;
            bottom: 0;
            width: 200px;
            background-color: #dddddd;
        }

        .pg-content .content{
            position: absolute;
            top: 48px;
            right: 0;
            bottom: 0;
            left: 200px;
            overflow: auto;
            z-index: 9;

        }
    </style>
</head>
<body>

    <div class="pg-header">
        <div class="logo left">
            老男孩
        </div>

        <div class="user right" style="position: relative">
            <a class="a" href="#">
                <img src="22.jpg">
            </a>
            <div class="b">
                <a href="#">我的资料</a>
                <a href="#">注销</a>
            </div>
        </div>

        <div class="icons right">
            <i class="fa fa-commenting-o" aria-hidden="true"></i>
            <span>5 </span>
        </div>
        <div class="icons right">
            <i class="fa fa-bell-o" aria-hidden="true"></i>
        </div>

    </div>
    <div class="pg-content">
        <div class="menu left">a</div>
        <div class="content left">
            <!--<div style="position: fixed;bottom:0;right:0;width: 50px;height: 50px;">返回顶部</div>-->
            <!--<div style="position: absolute;bottom:0;right:0;width: 50px;height: 50px;">返回顶部</div>-->
            <div style="background-color: purple">
            <p style="margin: 0;">asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
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            <p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p><p>asdf</p>
                </div>
        </div>
    </div>
    <div class="pg-footer"></div>
</body>
</html>